TECHSPEC® Hastings Triplet Achromatic Lenses

Hastings Triplets are the most popular high-power magnifiers available today, because their unique three-element design provides the ultimate in distortion-free, color-correct viewing. The lenses in this series are computer-designed to interact with each other, contributing to the reduction or elimination of “pincushion” distortion and chromatic and spherical aberrations. The triple lens system is made up of two concave meniscus elements cemented to a double convex lens. AR Coated, 1/4 wave MgF2. All dimensions are in mm.

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Description Stock No. Price In Stock  
Showing 1-6 of 6 Items | Sort by Spec
8mm Dia x 12.5mm EFL Hastings Triplet Achromat Lens
NT36-187 $69.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 8.00
Diameter Tolerance (mm) +0.0/-0.1
Effective Focal Length EFL (mm) 12.50
Back Focal Length BFL (mm) 9.90
Focal Length Tolerance (%) ±2
Radius R1 (mm) 9.48
Radius R2 (mm) 4.66
Radius R3 (mm) -4.66
Radius R4 (mm) -9.48
Edge Thickness ET (mm) 5.41
Center Thickness CT (mm) 7.18
Center Thickness A (mm) 5.40
Center Thickness B (mm) 0.89
Center Thickness Tolerance (mm) ±0.3
Design Wavelength DWL (nm) 587.6
Bevel 0.25mm x 45°
Substrate A N-K5
Surface Quality 40-20
Substrate B N-F2
Coating AR Coated 1/4wave MgF2
RoHS Compliant
6.25mm Dia x 10mm EFL Hastings Triplet Achromat Lens
NT67-417 $69.00Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 6.25
Diameter Tolerance (mm) +0.0/-0.1
Effective Focal Length EFL (mm) 10.00
Back Focal Length BFL (mm) 7.31
Focal Length Tolerance (%) ±2
Radius R1 (mm) 7.54
Radius R2 (mm) 4.16
Radius R3 (mm) -4.16
Radius R4 (mm) -7.45
Edge Thickness ET (mm) 5.64
Center Thickness CT (mm) 7.00
Center Thickness A (mm) 5.00
Center Thickness B (mm) 1.00
Center Thickness Tolerance (mm) ±0.3
Design Wavelength DWL (nm) 587.6
Bevel 0.25mm x 45°
Substrate A N-BK7
Surface Quality 40-20
Substrate B N-F2
Coating AR Coated 1/4wave MgF2
RoHS Compliant
23mm Dia x 40.3mm EFL Hastings Triplet Achromat Lens
NT30-229 $59.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 23.00
Diameter Tolerance (mm) +0.0/-0.1
Effective Focal Length EFL (mm) 40.30
Back Focal Length BFL (mm) 33.90
Focal Length Tolerance (%) ±2
Radius R1 (mm) 32.48
Radius R2 (mm) 18.15
Radius R3 (mm) -18.15
Radius R4 (mm) -32.48
Edge Thickness ET (mm) 13.79
Center Thickness CT (mm) 18.00
Center Thickness A (mm) 11.00
Center Thickness B (mm) 3.50
Center Thickness Tolerance (mm) ±0.3
Design Wavelength DWL (nm) 587.6
Bevel 0.25mm x 45°
Substrate A N-BK7
Surface Quality 40-20
Substrate B N-F2
Coating AR Coated 1/4wave MgF2
RoHS Compliant
15mm Dia x 25.4mm EFL Hastings Triplet Achromat Lens
NT30-120 $59.00Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 15.01
Diameter Tolerance (mm) +0.0/-0.1
Effective Focal Length EFL (mm) 25.40
Back Focal Length BFL (mm) 20.00
Focal Length Tolerance (%) ±2
Radius R1 (mm) 19.00
Radius R2 (mm) 9.30
Radius R3 (mm) -9.30
Radius R4 (mm) -19.00
Edge Thickness ET (mm) 9.41
Center Thickness CT (mm) 12.49
Center Thickness A (mm) 10.21
Center Thickness B (mm) 1.14
Center Thickness Tolerance (mm) ±0.3
Design Wavelength DWL (nm) 587.6
Bevel 0.25mm x 45°
Substrate A N-BK7
Surface Quality 40-20
Substrate B N-F2
Coating AR Coated 1/4wave MgF2
RoHS Exempt
12.5mm Dia x 20mm EFL Hastings Triplet Achromat Lens
NT45-251 $59.00Click for special volume pricing In stock and ready to ship. Click to add this item to your cart.
Diameter (mm) 12.50
Diameter Tolerance (mm) +0.0/-0.1
Effective Focal Length EFL (mm) 20.00
Back Focal Length BFL (mm) 16.31
Focal Length Tolerance (%) ±2
Radius R1 (mm) 14.95
Radius R2 (mm) 7.34
Radius R3 (mm) -7.34
Radius R4 (mm) -14.95
Edge Thickness ET (mm) 7.44
Center Thickness CT (mm) 10.18
Center Thickness A (mm) 7.98
Center Thickness B (mm) 1.10
Center Thickness Tolerance (mm) ±0.3
Design Wavelength DWL (nm) 587.6
Bevel 0.25mm x 45°
Substrate A N-BK7
Surface Quality 40-20
Substrate B N-F2
Coating AR Coated 1/4wave MgF2
RoHS Compliant
10mm Dia x 15mm EFL Hastings Triplet Achromat Lens
NT67-418 $59.00Click for special volume pricing Click to receive an email with delivery information. Click to add this item to your cart.
Diameter (mm) 10.00
Diameter Tolerance (mm) +0.0/-0.1
Effective Focal Length EFL (mm) 15.00
Back Focal Length BFL (mm) 11.21
Focal Length Tolerance (%) ±2
Radius R1 (mm) 11.33
Radius R2 (mm) 6.17
Radius R3 (mm) -6.17
Radius R4 (mm) -11.33
Edge Thickness ET (mm) 7.67
Center Thickness CT (mm) 10.00
Center Thickness A (mm) 8.00
Center Thickness B (mm) 1.00
Center Thickness Tolerance (mm) ±0.3
Design Wavelength DWL (nm) 587.6
Bevel 0.25mm x 45°
Substrate A N-BK7
Surface Quality 40-20
Substrate B N-F2
Coating AR Coated 1/4wave MgF2
RoHS Compliant
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